How can i stick my camera to a curve after a certain frames?
Parent the camera to the circle/curve/path. Then open up the Graph Editor* with Shift+F6. Click on the very steep curve. In the Left Menu, click on your path/curve/whatever.


Parent the camera to the circle/curve/path.
Open the Graph editor (Shift+F6)
Click on the curve, that doesnt look like the other ones
Click the "Expensian Thingi" for your curve/path/whatever, that should be listed in the very left menu
Click on Evaluation time
Press N to enable the menu on the right side
Go to the modifiers tab
On the "y" field, type in your start frame with a - in front (Start frame = 80, input to the field = -80)